current regulated pv

[o4_srt]

seems to me that a current regulated pv would yield a more consistent vape from atty to atty, as ive tested several of my cartos and attys and they range from 2.6 to 3.4 ohms.

by regulating the current, you would be regulating the power to a set level (p=i2r) (cell phone doesnt have a squared symbol).

this would mean that the pv would be much more consistent, regardless of what atty you have attached.

has this been tried before?

 

[Rocketman]

Don't recall seeing any mods using a current source. You are correct in that the power dissipated by the atty would be a linear function of resistance (with a fixed current).
With voltage regulation, or no regulation the power varies with the square of the resistance variations.

A low drop out voltage regulator can be configured as an adjustable constant current regulator. Search for application notes on constant current sources.

Rocket

 

[5cardstud]

I'm no electrical genius but I have found that the resistance varies from one carto or atty to the next. That being said the adjustable volt Buzz lets me adjust it manually to the proper setting for the attachment I'm vaping. The rest don't matter because I'm getting the best flavor and vapor production I can out of each and thats my reason for vaping.

 

[o4_srt]

ive noticed quite a difference between the 3 attys i currently have, and like the cartomizers best, i feel like curent regulation might be the way to go to get a good, consistent vape regardless of atty.

to the EE corner of the interwebs/my bookshelf of theory books!!!

 

[o4_srt]

I'm no electrical genius but I have found that the resistance varies from one carto or atty to the next. That being said the adjustable volt Buzz lets me adjust it manually to the proper setting for the attachment I'm vaping. The rest don't matter because I'm getting the best flavor and vapor production I can out of each and thats my reason for vaping.

an adjustable, current regulated device would be set and forget, regardless of what atty you use. since atty performance is directly related to heat produced, which is a function of current flow through the coil.

 

[Rocketman]

Server was too busy and lost my last attempt to post here.

The I squared R doesn't really come into play. If you increase voltage, current goes up (through the same resistance) thus the squared function. But if you regulate either voltage or current then the power is a linear relationship to resistance.

I was mislead by the squared relationship myself at first.

Calculate a fixed current through both resistances, then calculate a fixed voltage thru both resistances. Since only one source parameter changes the squared relationship doesn't apply.

Sounded good at first.

Rocket

 

[o4_srt]

good news, cut my passthrough so i could hook it up to a variable dc power supply. regardless of atty, at a given current level, they all perform very very consistently with one another (tested one with 2.6 ohms, one with 3.2 ohms, one with 3.4 ohms). adjusted voltage to desired current level, used 1.25 amps. vapor output, throat hit, and flavor were all almost identical at 1.25 amps.

now i need to design a circuit that can vary supply voltage to provide 1 to 1.5 amps, adjustable. im thinking of using 2 3.2v batteries to supply the source voltage. from my experiments, max voltage i need is about 5.75v to acheive 1.5 amps.

the fun begins, im over my head, and not far enough along in my education to accomplish this myself. ill have to corner an engineer at work at some point.